For sauce, cook onion in hot oil till tender but not brown; add the next 7 ingredients.
Simmer uncovered 15 minutes or until of nice sauce consistency.
Salt and pepper the ribs; lace in accordion style on spit, securing with holding forks.
Arrange hot coals at back of firebox, a foil drip pan in front of coals and under ribs.
Attach spit, turn on motor, and lower barbecue hood.
Let ribs rotate over slow coals 1 hour or till meat if well done.
Last 30 minutes, brush ribs frequently with sauce, and add dampened hickory to coals for smoke flavor.